HM Digital COM-80 EC/TDS/Temp Waterproof Hydro Tester

. The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. Measures electrical conductivity (EC), total dissolved solids (TDS). Excellent for hydroponic nutrient testing. Four scales: EC: μS, mS; TDS: ppm, ppt. Automatic Temperature Compensation (ATC). Water resistant. Measurement Range: 0-9990 μ S; 0-5000 ppm; 0-9.9 mS; 0-5.0 ppt. Digital Calibration (push button) to any point within the meter's range. Auto-off function, data-hold function and low-battery indicator. Display: large and easy-to-read LCD screen includes simultaneous temperature reading. Factory Calibrated: The COM-80 meter is calibrated with a 1413 μ S solution—can be recalibrated with digital calibration using the push buttons. Includes a protective cap and batteries. SPECIFICATIONS. EC Range: 0-9990 μ S; 0-9.9 mS. TDS Range: 0-5000 ppm (mg/L); 0-5.0 ppt. Temperature Range: 1-80°C/33-176°F. Resolution: 1 μ S/ppm; 0.1 mS/ppt. Temp. resolution: 0.1°C/F. Accuracy: +/- 2%. EC-to-TDS Conversion Factor: NaCl (avg of 0.5). Calibration: Digital calibration by push button. Probe: Fixed. Housing: Water resistant. Power source: 3 x 1.5V button cell batteries (included) (model LR44 or equivalent). Dimensions: 15.3 x 3.2 x 1.8 cm (6.0 x 1.3 x 0.7 inches). Weight: 53.9 g (1.9 oz). 1 year warranty.